After earning a Ph.D. in theoretical physics from Edinburgh University, Mark Denny pursued research at Oxford University from 1981 to 1984, then moved into a career in industry. He is the author of Ingenium: Five Machines That Changed the World; Blip, Ping, and Buzz: Making Sense of Radar and Sonar; Float Your Boat! The Evolution and Science of Sailing; and Froth! The Science of Beer, all of which are published by Johns Hopkins. Denny is now semi-retired and lives on Vancouver Island.